effective for president obama. he's used spanish-speaking volunteers talking about the issues, talking to other people in the community about that. just kind of one-to-one thing that really helps build trust in the hispanic community. this is someone we can trust. >> woodruff: greg allen joining us with a look at what both campaigns are doing to reach hispanic voters. thanks very much. >> my pleasure. >> ifill: tune in tomorrow night for special pbs' coverage of the first presidential debate, moderated by jim lehrer. mark shields and david brooks will join judy and me for real time analysis at 9:00 p.m. eastern time. but our coverage begins at noon online, when we begin live stream coverage with interviews on policy, a politics preview and a live blog throughout the debate itself. the conversation continues after the debate ends at a google-plus hangout with undecided battleground state voters. >> woodruff: there are new developments today in the benghazi consulate attack as congressional committee leaders turn up